Spraying apparatus



Sept. 29, 1925.

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S PRAYING APPARATUS Filed Sept. 12, 1924 5 Sheets-Sheet 5 1,555,797 A. l.. GRAMMER Patented Sept. 29,

UNITED STATES AALLEN' I'. GRAMMER, 0F PHILADELPHIA, PENNSYLVANIA.

SPRAYING APPARATUSt To all whom t 'may concern.'

Be it known that I, ALLEN L. GRAMMER,

a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and Iuseful Spraying Apparatus, of which the following is a specification.

The principal objects of the present inventionare, rst, to improve the delivery of the material to be sprayed and the'application of the air for spraying it; second, to provide apparatus for spraying particles of material fused by heat and which solidify at ordinary shop temperatures, of which parafline is an example, ont-o a web or plurality of sheets as it is or they are intermittently delivered from a rinting press; third, to provide for delivering the material in fused oiuid condition thereby avoid- 20 ing' clogging of the apparatus; fourth, to

provide a construction and arrangement of parts such that they can be readily assembled and disassembled; fth, to provide for automatically spraying the material in finely divided form intermittently 'so that it may fall or be fed when a web or sheets is or are present and may bechecked in the absence of a' web or sheets or when the press stops; and sixth, to provide satisfactory, re-

liable and eflicient apparatus for practicing the method set forth in my Patent 1,445,273v

of February 13, 1923. y

The invention will be claimed at the end hereof but will be lirst described in connection with the embodiment of it chosen for illustration in the accompanying drawings forming part hereof and in which- Figure ll is a top or plan view, partly in section, illustrating apparatus embodying features of the invention.

Fig. 2 is a front view of the same diagrammatically illustrating a printed web or sheets upon which the material is sprayed.

Fig. 3 is a sectional view drawn to an enlarged scale and taken on the line 3 3 of Fig. l.

Fig. 4 is a sectionalview taken von the line 4-4 of Fig. 3.

Fig. 5 is a front viewdrawn to an enlarged scale with parts broken away and it. may be said to be a front view of the righthand end portion shown in Fig. 2.

Fig. 6 is a sectional view taken pn the line 6-6 of Fig. 5.

Application led September 12, 1924. Serial No. 737,232.

Fig. 7 is an inverted plan view of some of the pipe connections illustrated in a general way at the center portion of Fig. 5.

Fig. 8 is a sectional view drawn to an enlarged scale in order to illustrate features of construction not shown in detail for lack of room at the upper portion of Fig. 6.

Fig. 9 is a transverse section through the nozzle portion of the spray head shown in Fig. 6, but drawn to an enlarged scale in order to show features of construction not shown in Fig. 6 for lack of room.

Fig. l0 is a plan view with parts broker away and parts omitted lookingup at the bottom of Fig. 9, and l Fig. 11 is a view principally in section showing the governing mechanism.

The invention has been illustrated in application to a printing press and will be described in vthat use, but it must be remembered that it, in certain of its aspects, is intended for other uses.

Referring to the drawings the frame or bar l extendsacross the deliveryend of a printing press and is suitably supported as v by supports 2. The printmg press is not shown because it is too well understood to require illustration. However, in the present description reference will be made to the delivery of sheets or webs of pages shown at al, b1, c2 and all, under the frame or bar with the freshly printed surfaces confrontingv the bar or frame,` Fig. 2.. The barv or frame is fitted with spray heads embodying features of the invention and generally indicated at 3 and of which four are shown, although the number is not essential and may be increased or diminished. In the description reference will be made to paratine descriptively and not necessarily exclusively as the material employed. From these spray heads parafline is sprayed by air jets, in the present instance intermittently, because the printed sheet or sheets or web or webs is'or are delivered intermittently. There is a reservoir or receptacle 4 in which parafne is heated and made fluid by electric heaters 5. A pump, generally indicated at 6, operates intermittently in response to what will be called,`for the sake of description', high pressure air 4to supply paraiine to manifolds generally indicated at 7 and 8, from which paraffine is distributed to the spray heads. High pressure air also operates to intermittently open the paraffine outlets of the spray heads as .will be described and for that purpose the`high pressure air is also delivered to the manifolds in a way that Will be hereinafter set forth, and similarly low pressure air is constantly delivered to the spray heads and it operates to spray the paratline as the latter escapes from the nozzles. Inasmuch as the spray heads are duplicates a description of one will suiiice. Each spray head is provided with a rectangular Wax outlet 9 and with a rectangular low pressure air outlet 22, arranged at an angle to the Wax outlet, so that air lischarged from the air outlet will comb across the wax outlet. sThe air liner or plate a, has a -notch cut in it and it projects beyond the vertical wall of the cut or space b. The plate 0 at the bottom also extends beyond the vertical wall of the cut or space b, as does also the plate o1. The

side walls of the notch in the liner aand the top of the plate c provide a rectangular air outlet open at itsitop or trough shaped beyond the vertical wallv of the space b and towards the wax outlet The rectangular wax opening is produced by three liners heat and it can be readilyftaken olf by rel" moving the conical n ut h, which also provides means for-horizontal angular adjustment. By replacing the liners with others it is possible to provide rectangular outlets of different size. The nozzle is generally cylindrical with a fiat face where the liners e, f and g are appliedby means of the plate G, and the liner a, andNplates c and c1 are applied to one of the bases and the retaining `plate chextends and underlies the Wax outlet 9. The other base is provided with a hub thatts into a recess inthe body of the head. The supply of wax to the outlet 9 is normally interrupted as shown, bymeans of a needlevalve A of which the stem 10 is fitted at@ the top with -a piston 11, Fig. 8,? working in a cylinder 12 and pressed by a spring 13, Fig. 6, into position for normally closing the needle valve A. 14 is a set screwfor limiting the extent to which the piston `11 can open the valve when high pressure air is introduced into the cylinder 12 as will be described.l Paraine is delivered i to the needle valve Al by a constant head gravity feed. -For this purpose there is a tank 15 having an overflow 16. This tank 15 communicates by. 51 to a passage 17 and by a branch 18 with the chamber surrounding` the needle valve stern 10. The passage. 17

extends below the branch 18 as at 19, and in y this portion 19 impurities may be collected for removal if necessary. Incross-section the lower portion le of the stem 10 may be cap 1, may clear the stem' 10 and hug thel wall of the chamberin which it is arranged to cause the sleeve to properly guide the spindle 10. 23 isa vent for-any air that may leak past the fitting 21 and 1, so that pressure on the wax in passage 20 does not exceed atmospheric pressure. 24 is a low /pressure air duct which leads to the air outlet 22. The paraline pump 6 consists of a body having a valved inlet connection 25 and two valved outlet connections 26 and 27. There is a pump plunger 28- worked in one 4direction by a spring 29 Aand in the other direction by a. piston 30 Working ina cylinder 31iand subjected intermittently to high pressure air by way ofthe duct-32, Fig. v3. A gauze 33 is shown and it serves .to strain the paraffine enteringJ the pump from the reservoir. m are vents for leakage.

A description will nowbe given of. the socalled high ressure air connection. High pressure air rom aisuitable supply enters by the connections 34, Fig. 3, and there is an admission and exhaust relay valve 35, the

exhaust being at 36. This pilot valve is con'- trolled by a third air line 37 through a piston and cylinder 38. vThe airline 37 is controlled, as will be described, by the deli-very 'fmovements of the press in such a way that pilot valve 35 is moved to admission and exalist at` appropriate andpredetermined intervals. The pipe 39 Aconnects with avdistributor 40 shown to consist of a removable chambered plate. p a pipe 41 leadsto'the duct 32,0f the pump cylinder31. The pipe 41 is of generally U- shape andA its arms 'are-fitted into the bar lv which is fitted with ports of which one communicates with the chamber of the distriubtor 40, and o f which the otheris aligned From the distributor 40 tributor 45, Fig. 4, from which it reaches the manifolds 8 by pipe 46, Figs. 5 and 7, and from the manifold it passes by pipes 47 to the duct 48 that leads to the passage 24 of each of a ,pair of spray heads. From'each outlet of the pump parafline orwax is conducted by apipe 49 to a manifold 8, Figs. 4 and 7, and from the manifold by a pipe 50, Figs. 6 and 8, to a Ascreen or sieve o, arranged above the tank 15.

In the immediately preceding portion of this description reference has been made to the manifold 8, but the connection tothe manifold 7 are substantial duplicates of those described in connection with the manifold 8 and consequently the same reference numbers have been applied to them.

The third air line isy controlled by an admission and exhaust valve 52, Fig. 1l, interposed in the air line 37. The stem 53 of this valve is operated by a lever 54, which, when lraised, operates to let air pass to cylinder 38, Fi 3, to open valve 35 and effect a spray o wax at the spray heads, as will be described. The centrifugal governor 55, driven from or with the press, is connected with one end of the lever 54 and operates., when the press isi shut down to drop the stem 53 and close the .valve 52 and prevent spraying until the press is started, and then the cam 56 turned with the sheet delivery of the press operates upon the other end vof the lever 54 and controls the valve 52 to cause spraying at the proper time or intervals oftime.

The mode of operation may be described as follows: e

The press delivers sheets or webs with a printed face upwards in the general direction of out of the plane of the paper in Fig. 2, and at each delivery opens and after a proper interval, closes the pilot valve 38 in co-ordination with which the valve 35 admits and exhausts high pressure air. The high pressure air operates the pump 6 to provide a proper supply of melted'paralline in the constant level tanks 15, and also to open and after a short interval to close the needle valve A, thus' there is a feed or delivery of parafline which by the low pressure air escaping at 22 is delivered or deposited as a spray or in finely divided Acondition upon the printed faces of the sheets or webs as they leave the press where it`serves to prevent offset.

In referring to a wax outlet and to a low pressure air outlet I do not mean to limit the invention to the use of paraiiine or to any particular pressure of air but my intention il to define the outlets and to distinguish t em.

It willbe obvious to those skilled in the art to which the invention relates that modi-` `fications maybe made in detailsfof construction and arrangement without departing from the spirit of the invention which is not limited as to such things or as to matters of mere form or otherwise than as the prior art and the appended claims may require.

` I claim: p f 1. Spraying apparatus comprising a spray head'having an oblong wax outlet and an oblong low pressure air outlet angularly arranged in respect to each other to cause the discharged air to combacross the discharged wax, there being an inclined air guiding wall provided between the outlets,

the air discharge outlet being of open trough shape in confronting relation to said inclined wall, means for supplying air to the air outlet, and feed connections for supplying iiuid material to the wax outlet.

2. Spraying apparatus comprising a generally cylindrical nozzle provided at its curved wall and near one o'f its bases with a dat surface and having through it and through both its bases an air channel and having through one base and through it and through said flat surface a wax chanri l, an oblong slit-like airoutlet provided through liners applied to ,the fiat surface and ofA which some are notched, an oblong troughlike air outlet provided through liners a plied at the iirst Ymentioned base and of z which some are slotted and some extend in front of the wax outlet, there being an inlmed wall between sa1d outlets, means for sppplying air to the air outlet, and feed conn 'ctions for the wax outlet, substantially asl` described. p I3. "Spraying apparatus comprising a spray head including a nozzle having a lateral notch and provided with a downwardly directedfoblo'ng wax outlet and with a laterally directed oblong air outlet arranged through the top and through the inner walls of said notch, a needle valve for the wax supply, spring pressed pneumatic means for 4 the needle valve, and a gravity wax feed.

4. Spraying apparatus comprising a bar or frame, a reservoir carried bythe frame and adapted to contain a supply of paraiiine,

means for heating the reservoir to melt the paraftine, spray heads in spaced relation carried by the reservoir and each provided with oblong slit-like air and wax outlets, interconnected manifolds and distributors carried by the reservoir, pneumatic springv pressed needle valve mechanism and a gravity feed for the spray heads, a spring pressed pneumatic paraffine pump arranged in the reservoir and connected throu h the manifolds with .the gravity feed devlces, a high pressure airsupply connected through the distributors and from the manifolds to, the needle valve mechanism and from a distributor to the pump, and a low pressure air supply connected Lthrough a distributor to the low pressure outlets of the spray heads.

5. Spraying outlets comprising a spray head having a normally closed needle valved oblong wax outlet and a constant head gravl ityv lfeed to said outlet and having a low pressure oblong air outlet arranged to discharge across the air outletfhi-gh pressure air connections/for opening the`normally closed needle v'alved outlet and including means for limiting the extent of such opening, a heatedv reservoir, a spring pressed pneumatic pump having high pressure air connection for imparting a pumping yiinpulse to it, connections from the pump to the constant head gravity feed, a low pressure air supply for the air outlet, and `re lay valvehconnectlions for controlling the admissionl and exhaust of high pressure air,

substantially as described.

6. Sprayin apparatus comprising, a row of spray hea s each having an oblong low s pressure air outlet and a normally closed needle valved oblong parafne outlet, means for feeding parane under constant pressure tok the paraineoutlets, an air supply. for the air outlets, and intermittent mechanism for opening the needle valve outlets.

7. Spraying apparatuscomprising a spray 30 head havlng a needle valve and an oblonvr wax outlet for discharging parafinean having an oblong outlet for discharging air to spray the paraline, means for normally closing. the needle valve, and air pressure 35 connections foryopening the needle valve.

.-8. Spraying apparatus comprising a spray head having an undercut notch and provided with a downwardly discharging oblong wax outlet confronting the lower 40 wall of the notch and an oblong air outlet arranged in the bottom wall of the notch and adapted to 'dischar e between the topt and bottom walls thereo and an air supply for said air outlet, pneumatic` feed and vvalve 45 l ALLEN L. GRAMMER. 

